Brocade Communications Systems 6650 manual LLDP-MED TLVs, Mandatory TLVs, Chassis ID, Port ID

General LLDP operating principles 8

LLDP-MED TLVs

Brocade devices honor and send the following LLDP-MED TLVs, as defined in the TIA-1057 standard:

•LLDP-MED capabilities

•Network policy

•Location identification

•Extended power-via-MDI

Mandatory TLVs

When an LLDP agent transmits LLDP packets to other agents in the same 802 LAN segments, the following mandatory TLVs are always included:

•Chassis ID

•Port ID

•Time to Live (TTL)

This section describes the above TLVs in detail.

Chassis ID

The Chassis ID identifies the device that sent the LLDP packets.

There are several ways in which a device may be identified. A chassis ID subtype, included in the TLV and shown in Table 42, indicates how the device is being referenced in the Chassis ID field.

TABLE 42	Chassis ID subtypes
ID subtype	Description
0	Reserved
1	Chassis component
2	Interface alias
3	Port component
4	MAC address
5	Network address
6	Interface name
7	Locally assigned
8 – 255	Reserved

Brocade ICX 6650 devices use chassis ID subtype 4, the base MAC address of the device. Other third party devices may use a chassis ID subtype other than 4. The chassis ID will appear similar to the following on the remote device, and in the CLI display output on the Brocade device (show lldp local-info).

Chassis ID (MAC address): 748e.f80c.5f40

The chassis ID TLV is always the first TLV in the LLDPDU.

Port ID

The Port ID identifies the port from which LLDP packets were sent.

Brocade ICX 6650 Administration Guide	189
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